1. 1Hamad Medical Corporation, Hamad General Hospital, Medical Intensive Care Unit, P.O. Box 3050, Doha, Qatar. www.hamad.qa
2. 2Hamad Medical Corporation Ambulance Service (HMCAS), P.O. Box 3050, Doha, Qatar. http://as.hamad.qa
3. 3University of Hertfordshire, College Lane Campus, Hatfield, Herts AL10 9AB, UK. www.herts.ac.uk
4. 4Northumbria University, Coach Lane Campus, Newcastle upon Tyne NE7 7XA, UK. www.northumbria.ac.uk